CN204330091U - Bell jar type gas flowmeter calibrating installation - Google Patents

Bell jar type gas flowmeter calibrating installation Download PDF

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Publication number
CN204330091U
CN204330091U CN201420744035.1U CN201420744035U CN204330091U CN 204330091 U CN204330091 U CN 204330091U CN 201420744035 U CN201420744035 U CN 201420744035U CN 204330091 U CN204330091 U CN 204330091U
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bell
jar
gas flow
standard equipment
flow standard
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CN201420744035.1U
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Inventor
肖晖
周轶
赵作广
董芳
王福贵
李志�
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ZHENJIANG METROLOGICAL VERIFICATION TESTING CENTER
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ZHENJIANG METROLOGICAL VERIFICATION TESTING CENTER
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Abstract

The utility model discloses a kind of bell jar type gas flowmeter calibrating installation.It comprises bell-jar gas flow standard equipment, measured stream scale, computer control system, and bell-jar gas flow standard equipment has pressure transducer P awith temperature sensor T aand temperature sensor T a+, pressure transducer P awith temperature sensor T a ,t a+signal output part connect the signals collecting end of computer control system; The front end of multiple measured stream scale is all connected on an air inlet pipeline, and air inlet pipeline extend in bell-jar gas flow standard equipment, and the front end of each measured stream scale is provided with pressure transducer P bwith temperature sensor T b, pressure transducer P b, temperature sensor T band the pulse signal output end of measured stream scale all connects the signals collecting end of computer control system.After adopting above-mentioned structure, its vibrational power flow is reasonable, and automaticity is high, and not only detection efficiency improves greatly, and accuracy of detection is also very high.

Description

Bell jar type gas flowmeter calibrating installation
Technical field
The utility model relates to the calibrating installation that a clock is applicable to all kinds of gas volume formula flowmeter, specifically a kind of bell-type gas meter calibrating installation.
Background technology
Adopting bell-jar gas flow standard equipment to examine and determine all kinds of flowmeter is just be achieved in recent years, and for gas volume formula flowmeter, adopting bell jar to make standard, is the most rational calibration method.At present, the device of domestic employing bell-jar gas flow standard equipment calibrating gas volume formula flowmeter has many families, but technical indicator is not high with configuration, its index and configuration are generally: the bell jar pressure of (10-500) L is about 1.3kPa, the bell jar pressure of 1000L is about 1.6kPa, the bell jar pressure of 2000L is about 2kPa, device expansion is uncertain is Ur=0.5%, (k=2), pipeline connecting mode is that flexible pipe connects, control operation mode is manually, verification result process adopts artificial calculating, substantially temperature is not configured, pressure unit, each inspection table number is a flowmeter.As can be seen here, adopt existing bell-jar gas flow standard equipment calibrating flowmeter to there is bell jar pressure low, can only detect single only table, efficiency is low, has larger uncertainty, truly can not reflect the problems such as the metering performance quality of flowmeter.
Summary of the invention
The technical problems to be solved in the utility model is to provide the bell jar type gas flowmeter calibrating installation that a kind of bell jar pressure is large, automaticity is high, efficiency is high, accuracy of detection is high.
In order to solve the problems of the technologies described above, bell jar type gas flowmeter calibrating installation of the present utility model, comprise bell-jar gas flow standard equipment, measured stream scale, computer control system, bell-jar gas flow standard equipment has the pressure transducer P being positioned at bell-jar gas flow standard equipment awith temperature sensor T aand the temperature sensor T be positioned at outside bell-jar gas flow standard equipment a+, pressure transducer P awith temperature sensor T a, T a+signal output part connect the signals collecting end of computer control system; The front end of multiple measured stream scale is all connected on an air inlet pipeline, and air inlet pipeline extend in bell-jar gas flow standard equipment, and the front end of each measured stream scale is provided with the pressure transducer P be positioned on air inlet pipeline bwith temperature sensor T b, pressure transducer P b, temperature sensor T band the pulse signal output end of measured stream scale all connects the signals collecting end of computer control system.
Be connected on air inlet pipeline after described multiple measured stream scale series connection.
Measured stream scale after described many group series connection is connected in parallel on air inlet pipeline.
Described in each, measured stream scale is connected in parallel on air inlet pipeline respectively.
Described measured stream scale rear end is connected with back pressure pipeline, and back pressure pipeline has operation valve, and the signal input part of described operation valve connects the signal output part of computer control system.
Described air inlet pipeline has pneumatic on-off valve, and the signal output part of pneumatic on-off valve connects the signals collecting end of computer control system.
The front end of described measured stream scale all has straight-run of pipe, pressure transducer P bwith temperature sensor T bbe positioned on straight tube.
There is straight-run of pipe the described front end being positioned at a measured stream scale foremost, pressure transducer P bwith temperature sensor T bbe positioned on straight tube, the front end being positioned at each measured stream scale at rear is provided with the connecting pipe with fairing, connecting pipe is provided with pressure transducer P cwith temperature sensor T c, pressure transducer P b, P c, temperature sensor T b, T cand the pulse signal output end of each measured stream scale all connects the signals collecting end of computer control system.
Also draw-tube is provided with between described measured stream scale and operation valve.
Described bell-jar gas flow standard equipment is set to large bell-jar gas flow standard equipment and little bell-jar gas flow standard equipment, large bell-jar gas flow standard equipment is for examining and determine the large discharge of flowmeter, little bell-jar gas flow standard equipment, for examining and determine the low discharge of flowmeter, is positioned at the pressure transducer P of large bell-jar gas flow standard equipment and little bell-jar gas flow standard equipment awith temperature sensor T aand the temperature sensor T be positioned at outside large bell-jar gas flow standard equipment and little bell-jar gas flow standard equipment a+signal output part all connect the signals collecting end of computer control system; Described air inlet pipeline has two groups of pneumatic on-off valves, computer control system can select bell-jar gas flow standard equipment and pipeline bore according to the parameter of the tested flowmeter of input by control two groups of pneumatic valves automatically.
After adopting above-mentioned structure, the pressure before each measured stream scale can be detected in testing process, temperature, detect the temperature in bell-jar gas flow standard equipment simultaneously, pressure, be transported in computer control, computer control system gathers the temperature in bell-jar gas flow standard equipment middle bell jar, pressure before pressure and flowmeter, temperature also can to temperature, pressure compensating for variations after comparing process by computing machine, and between every two tested tables, fairing is housed, can evenly upstream positive displacement table cavity discharge air-flow, make air-flow more stable, can ensure that again the out-of-date pressure loss of gas flow is less, the requirement pressure of two flowmeters can be met, two the high pressure bell jars simultaneously arranged are combined into standard set-up, computer control system can control the automatic choice criteria device of pneumatic valve and pipeline bore according to the parameter of the tested flowmeter of input by two groups, the flowmeter of two groups of same models can be examined and determine thus at every turn, after automatic choice criteria device and pipeline bore, computer control system will gather the temperature and pressure in corresponding bell jar and every measured stream gauge pipeline by temperature and pressure sensor and temperature and pressure transmitter, and compared after process temperature, pressure compensating for variations by computing machine, in the bell jar of every flowmeter pipeline and correspondence, temperature, pressure compensating for variations system is all independently, each calibrating is all gather the temperature and pressure in corresponding bell-jar gas flow standard equipment and tested flowmeter pipeline, then temperature, pressure compensating for variations is carried out, determine the accuracy of tested flowmeter, computer control system controls operation valve, accurate control instantaneous delivery, its vibrational power flow is reasonable, automaticity is high, not only detection efficiency improves greatly, accuracy of detection is also very high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model bell jar type gas flowmeter calibrating installation embodiment one;
Fig. 2 is the structural representation of the utility model bell jar type gas flowmeter calibrating installation embodiment two.
In figure 1, large bell jar type gas flowmeter calibrating installation; 2, large bell jar type gas flowmeter calibrating installation; 3, computer control system; 4, air inlet pipeline; 5, back pressure pipeline; 6, operation valve; 7, draw-tube; 8, tank; 9, bell jar; 10, straight tube; 11, pneumatic on-off valve; 12, connecting pipe; 13, scrambler; 14, limit switch; 15, optoelectronic switch; 16, pneumatic on-off valve 17, fairing.
Embodiment
Below in conjunction with the drawings and specific embodiments, bell jar type gas flowmeter calibrating installation of the present utility model is described in further detail.
Embodiment one:
As shown in the figure, bell jar type gas flowmeter calibrating installation of the present utility model, comprise bell-jar gas flow standard equipment, measured stream scale, computer control system 3, bell-jar gas flow standard equipment has the pressure transducer P being positioned at bell-jar gas flow standard equipment awith temperature sensor T aand the temperature sensor T be positioned at outside bell-jar gas flow standard equipment a+, pressure transducer P awith temperature sensor T a, T a+signal output part connect the signals collecting end of computer control system 3; The front end of multiple measured stream scale is all connected on an air inlet pipeline 4, and air inlet pipeline 4 extend in bell-jar gas flow standard equipment, and the front end of each measured stream scale is provided with the pressure transducer P be positioned on air inlet pipeline 4 bwith temperature sensor T b, pressure transducer P b, temperature sensor T band the pulse signal output end of measured stream scale all connects the signals collecting end of computer control system 3; Measured stream scale rear end is connected with back pressure pipeline 5, back pressure pipeline 5 has operation valve 6, and said operation valve 6 is motor-operated control valve; The signal input part of operation valve 6 connects the signal output part of computer control system 3, controls valve opening by computing machine; Draw-tube 7 is also provided with between measured stream scale and operation valve 6, said draw-tube 7 adopts the QSS type pneumatic expansion joint with pipeline same diameter, be used for stepping up tested gauging table, adopt stainless steel to make with medium contact part, stainless steel is 1Cr18Ni9Ti; Said air inlet pipeline 4 has pneumatic on-off valve 11, and the signal output part of pneumatic on-off valve 11 connects the signals collecting end of computer control system.
Further, said measured stream scale is set to two or more, they both can, as being connected on air inlet pipeline 4 after one group of series connection, also can be connected on air inlet pipeline 4 respectively side by side, and the measured stream scale after certainly each group series connection also can being connected in parallel on air inlet pipeline 4 in groups respectively.
When multiple measured stream scale is connected on air inlet pipeline 4 respectively side by side, the front end of each measured stream scale all has straight-run of pipe 10, pressure transducer P bwith temperature sensor T bbe positioned on straight tube 10.When to be connected on air inlet pipeline 4 after multiple measured stream scale is as one group of series connection or measured stream scale after each group series connection respectively being connected in parallel on air inlet pipeline 4 in groups time, there is straight-run of pipe 10 front end being positioned at a measured stream scale foremost, pressure transducer P bwith temperature sensor T bbe positioned on straight tube 10, the front end being positioned at each measured stream scale at rear is provided with the connecting pipe 12 with fairing 17, connecting pipe 12 is provided with pressure transducer P cwith temperature sensor T c, pressure transducer P b, P c, temperature sensor T b, T cand the pulse signal output end of each measured stream scale all connects the signals collecting end of computer control system 3.
Moreover, bell-jar gas flow standard equipment of the present utility model is existing high precision bell-jar gas flow standard equipment, the bell jar 9 that it comprises tank 8 and is buckled in tank, water in tank makes to be sealed with air between bell jar and the water surface, air inlet pipeline 4 extend in bell jar 8 through the water surface, the limit switch 14 bell-jar gas flow standard equipment being also provided with scrambler 13 and cooperatively interact with scrambler and optoelectronic switch 15, the signal of scrambler 13 is input in computer control system the distance carried out accurate Calculation bell jar and decline.
Embodiment two:
As shown in Figure 2, bell jar type gas flowmeter calibrating installation of the present utility model, comprise a large bell-jar gas flow standard equipment 1 and a little bell-jar gas flow standard equipment 2, large bell-jar gas flow standard equipment 1 is identical with the structure of little bell-jar gas flow standard equipment 2, and the capacity of large bell-jar gas flow standard equipment 1 is 2000L, the capacity of little bell-jar gas flow standard equipment 2 is 200L, has pressure transducer P in little bell-jar gas flow standard equipment 2 a2with bell jar head temperature sensor T a2+with bell jar bottom temp sensor T a2, there is in large bell-jar gas flow standard equipment pressure transducer P a1with bell jar head temperature sensor T a1+with bell jar bottom temp sensor T a1, be positioned at the pressure transducer P of large bell-jar gas flow standard equipment a1with with temperature sensor T a1, pressure transducer P in little bell-jar gas flow standard equipment a2with temperature sensor T a2and the temperature sensor T be positioned at outside large bell-jar gas flow standard equipment 1 a1+with the temperature sensor T outside little bell-jar gas flow standard equipment 2 a2+signal all connect the signals collecting end of computer control system through temperature and pressure transmitter, there is straight-run of pipe 10 front end being positioned at a measured stream scale foremost, straight tube 10 has pressure transducer P bwith temperature sensor T b, the front end being positioned at each measured stream scale at rear is provided with the connecting pipe 12 with fairing 17, connecting pipe 12 is provided with pressure transducer P cwith temperature sensor T c, pressure transducer P b, P c, temperature sensor T b, T cand the pulse signal output end of each measured stream scale all connects the signals collecting end of computer control system 3, air inlet pipeline 4 has two groups of pneumatic on-off valves, computer control system can select bell-jar gas flow standard equipment and pipeline bore according to the parameter of the tested flowmeter of input by control two groups of pneumatic valves automatically, little bell-jar gas flow standard equipment 2 is for examining and determine low discharge [(0.1-5) m of flowmeter 3/ h], large bell-jar gas flow standard equipment 1 is for examining and determine large discharge [(5-120) m of flowmeter 3/ h], by increasing the thickness of bell jar wall, can make in bell jar, to bear pressure and become large (the bell jar pressure 2.5kPa of the little bell-jar gas flow standard equipment 2 of 200L, the bell jar pressure 4.7kPa of the large bell-jar gas flow standard equipment 1 of 2000L), therefore large bell-jar gas flow standard equipment 1 and the calibrating of little bell-jar gas flow standard equipment 2 series system is adopted, each flowmeter examining and determine two same models, the fairing be equipped with between two tested flowmeters, the gas between two tested flowmeters can be eliminated, stream pressure is stablized, can ensure that again the out-of-date crushing of gas flow is less, the pressure of two meter proof needs can be met, this device can be used for all kinds of gas volume formula flowmeters examining and determine bore DN5-DN80, range detection (0.1-120) m of calibrating 3/ h, device expansion is uncertain is Ur=0.2%, (k=2).
Its course of work is as follows:
Before calibrating flowmeter, computer control system selects bell-jar gas flow standard equipment and pipeline bore according to the parameter of the tested flowmeter of input automatically by controlling pneumatic valve 11, when examining and determine beginning, bell jar 9 declines, the gas that bell jar 9 is discharged is by air inlet pipeline 4, control select pneumatic valve 11 and pneumatic valve 16 and open, by pneumatic valve 11, gas enters a tested flowmeter foremost by straight tube 10, then tested flowmeter is below entered through connecting pipe 12 (in have fairing 17), finally by entering in air after motor-operated control valve 6 adjust flux, when bell jar 9 drops to a certain position (or getting rid of the gas of predetermined volume),
Valve closing, system completes once examines and determine, simultaneously, after automatically selecting bell-jar gas flow standard equipment and pipeline bore, computer control system will gather the temperature and pressure in corresponding bell jar and every only tested flowmeter pipeline by temperature and pressure sensor and temperature and pressure transmitter, and compared after process temperature, pressure compensating for variations by computing machine, in the bell jar of every flowmeter pipeline and correspondence, temperature, pressure compensating for variations system is all independently, each calibrating is all gather the temperature and pressure in corresponding bell-jar gas flow standard equipment and tested flowmeter pipeline, then temperature, pressure compensating for variations is carried out, determine the degree of accuracy of measured stream gauge, and the data that decline of the bell jar selected by gathering and flowing through by the data on flows of the inspection flowmeter of connecting, write down the time flowing through these flows, automatically calculated by calculation procedure, display and export verification result, and to print.

Claims (10)

1. a bell jar type gas flowmeter calibrating installation, comprise bell-jar gas flow standard equipment, measured stream scale, computer control system (3), it is characterized in that: described bell-jar gas flow standard equipment has the pressure transducer P being positioned at bell-jar gas flow standard equipment awith temperature sensor T aand the temperature sensor T be positioned at outside bell-jar gas flow standard equipment a+, described pressure transducer P awith temperature sensor T a,t a+signal output part connect the signals collecting end of computer control system; The front end of multiple measured stream scale is all connected on an air inlet pipeline (4), described air inlet pipeline (4) extend in bell-jar gas flow standard equipment, and the front end of each described measured stream scale is provided with the pressure transducer P be positioned on air inlet pipeline (4) bwith temperature sensor T b, described pressure transducer P b, temperature sensor T band the pulse signal output end of measured stream scale all connects the signals collecting end of computer control system (3).
2. according to bell jar type gas flowmeter calibrating installation according to claim 1, it is characterized in that: be connected on air inlet pipeline (4) after described multiple measured stream scale series connection.
3. according to bell jar type gas flowmeter calibrating installation according to claim 2, it is characterized in that: the measured stream scale after described many group series connection is connected in parallel on air inlet pipeline (4).
4. according to bell jar type gas flowmeter calibrating installation according to claim 1, it is characterized in that: measured stream scale described in each is connected in parallel on air inlet pipeline (4) respectively.
5. according to bell jar type gas flowmeter calibrating installation according to claim 2, it is characterized in that: described measured stream scale rear end is connected with back pressure pipeline (5), back pressure pipeline (5) has operation valve (6), the signal input part of described operation valve (6) connects the signal output part of computer control system (3).
6. according to bell jar type gas flowmeter calibrating installation according to claim 1, it is characterized in that: described air inlet pipeline (4) has pneumatic on-off valve (11), the signal output part of pneumatic on-off valve (11) connects the signals collecting end of computer control system.
7. according to bell jar type gas flowmeter calibrating installation according to claim 4, it is characterized in that: the front end of described measured stream scale all has straight-run of pipe (10), pressure transducer P bwith temperature sensor T bbe positioned on straight tube (10).
8., according to bell jar type gas flowmeter calibrating installation according to claim 3, it is characterized in that: described in be positioned at a measured stream scale foremost front end have straight-run of pipe (10), pressure transducer P bwith temperature sensor T bbe positioned on straight tube (10), the front end being positioned at each measured stream scale at rear is provided with the connecting pipe (12) with fairing (17), and (12) are provided with pressure transducer P to connecting pipe cwith temperature sensor T c, pressure transducer P b, P c, temperature sensor T b, T cand the pulse signal output end of each measured stream scale all connects the signals collecting end of computer control system (3).
9. according to bell jar type gas flowmeter calibrating installation according to claim 1, it is characterized in that: between described measured stream scale and operation valve (6), be also provided with draw-tube (7).
10. according to the bell jar type gas flowmeter calibrating installation one of claim 1-9 Suo Shu, it is characterized in that: described bell-jar gas flow standard equipment is set to large bell-jar gas flow standard equipment and little bell-jar gas flow standard equipment, large bell-jar gas flow standard equipment is for examining and determine the large discharge of flowmeter, little bell-jar gas flow standard equipment, for examining and determine the low discharge of flowmeter, is positioned at the pressure transducer P of large bell-jar gas flow standard equipment and little bell-jar gas flow standard equipment awith temperature sensor T aand the temperature sensor T be positioned at outside large bell-jar gas flow standard equipment and little bell-jar gas flow standard equipment a+signal output part all connect the signals collecting end of computer control system; Described air inlet pipeline (4) has two groups of pneumatic on-off valves, computer control system can select bell-jar gas flow standard equipment and pipeline bore according to the parameter of the tested flowmeter of input by control two groups of pneumatic valves automatically.
CN201420744035.1U 2014-12-01 2014-12-01 Bell jar type gas flowmeter calibrating installation Active CN204330091U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105352568A (en) * 2015-11-25 2016-02-24 山东思达特测控设备有限公司 Method for collecting and calculating low-frequency pulse signals of gas flow meter calibration device
CN109577923A (en) * 2018-12-03 2019-04-05 重庆大学 It is a kind of for measure coal-bed gas exploitation test when reverse irrigation amount device
WO2020258284A1 (en) * 2019-06-28 2020-12-30 深圳市大疆创新科技有限公司 Flowmeter calibration system, method and apparatus, and storage medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105352568A (en) * 2015-11-25 2016-02-24 山东思达特测控设备有限公司 Method for collecting and calculating low-frequency pulse signals of gas flow meter calibration device
CN105352568B (en) * 2015-11-25 2018-11-09 山东思达特测控设备有限公司 A kind of acquisition computational methods of gas flowmeter caliberating device low frequency pulse signal
CN109577923A (en) * 2018-12-03 2019-04-05 重庆大学 It is a kind of for measure coal-bed gas exploitation test when reverse irrigation amount device
WO2020258284A1 (en) * 2019-06-28 2020-12-30 深圳市大疆创新科技有限公司 Flowmeter calibration system, method and apparatus, and storage medium

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